农村低压电网末端电压补偿技术研究与应用

针对目前我国部分偏远地区的低电压状况,并结合相关台区实际情况和一些其他客观因素,提出一种适用于农村低压电网末端电压补偿的装置并对其工作原理及性能特点进行研究,最后结合实践应用情况进行分析,并提出相关注意点和应对措施.     

The effects of cultural dimension on ICT innovation: Empirical analysis of mobile phone services

ICT Innovation is one of the major forces for socioeconomic development. It is the key element to spur growth of the economy of a nation. Several studies have shown that culture is a crucial determinant of innovations. This study examines the effect of socio-cultural factors on ICT innovation with specific focus on the mobile banking services. Research was conducted on 220 respondents from sampled population in South Africa. The questionnaire used in this study was developed based on previous studies that have proven validity. The findings indicate that culture is an appropriate concept to describe how innovation in information and communication technology can be influenced by human behavior.     

Encrypted signal-based reversible data hiding with public key cryptosystem

Encrypted image-based reversible data hiding (EIRDH) is a well-known method allowing that (1) the image provider gives the data hider an encrypted image, (2) the data hider embeds the secret message into it to generate the encrypted image with the embedded secret message to the receiver, and (3) finally the receiver can extract the message and recover the original image without encryption. In the literature, the data hider and image provider must be specific parties who know the shared key with the receiver in traditional encrypted image-based reversible data hiding. In this paper, we propose an encrypted signal-based reversible data hiding (ESRDH) with public key cryptosystem, not only for images. The proposed scheme is secure based on Paillier homomorphic encryption. Finally, the experimental results show that the proposed scheme has much payload and high signal quality.     

中国通信市场的发展现状与投资趋势

本文首先介绍了2000年中国通信市场的情况，然后从电话交换、接入网、光通信网络、移动通信、数据通信和因特网这六个方面预测了2001年中国通信市场的发展趋势，并指出未来5年内中国通讯市场的发展主要集中在移动通信、数据通信和因特网相关联的通信业务方面。     

可编程看门狗监控E2PROM-X25045及其应用

本文给出了一种可编程看门狗芯片--X25043/45,阐述了它的基本工作原理和软件设计方法,并介绍了它在实际数据采集中的应用.     

High Efficiency Annular Denuder for Formaldehyde Monitoring

Abstract

A practical and correct methodology for evaluating CH₂O in air without sampling artifact formation is presented. Formaldehyde is collected on an annular denuder coated with bisulfite-triethanolamine. The sorbent layer is extracted with water and the solution analyzed by the chromotropic acid (CTA) procedure. Sorption efficiency and loading capacity have been investigated along with storage stability.

Results of laboratory validation studies have indicated that a small annular denuder was able to sample about 300 μg CH₂O without an appreciable decrease in the initial collection efficiency (99% at 2.5 1 min^?1).

Tests on storage stability before and after exposure have also demonstrated that both oxidation of bisulfite and release of CH₂O did not occur for time periods as long as 1 month.     

Granting and managing loans for micro-entrepreneurs: New developments and practical experiences

We present a methodology to grant and follow-up credits for micro-entrepreneurs. This segment of grantees is very relevant for many economies, especially in developing countries, but shows a behavior different to that of classical consumers where established credit scoring systems exist. Parts of our methodology follow a proven procedure we have applied successfully in several credit scoring projects. Other parts, such as cut-off point construction and model follow-up, however, had to be developed and constitute original contributions of the present paper. The results from two credit scoring projects we developed in Chile, one for a private bank and one for a governmental credit granting institution, provide interesting insights into micro-entrepreneurs’ repayment behavior which could also be interesting for the respective segment in countries with similar characteristics.     

原子吸收光谱仪的升级改造

本文对原子吸收光谱仪的升级改造进行了探索，使用先进的计算机控制技术，取代原仪器故障频繁的数据处理及记录部分，使升级改造后的仪器在分析精度，分析速度，自动化程度等方面大大提高，该技术一个突出的特点是：软件全部在中文Windows 下操作，更适合国情。     

Point-based integration for 3D object reconstruction from Ladar range images

A method of point-based integration from multiple registered laser radar (Ladar) range images for 3D object reconstruction is presented in this literature. Our method operates surface point data directly and provides a direct way for overlapping data removal. The overlapping areas were detected using a single distance threshold. In order to set the distance threshold, a local point density approach is introduced to solve it. Compared with the mesh-based, volumetric and other points-based integration approaches, our method is simple and fast, and need less storage memory. The approach is performed on various objects with different geometric shapes. The experimental results demonstrate the efficiency and feasibility of our method.